Power supply



FIG. 1 is a bottom view of a power supply.

FIG. 2 is first side view of a power supply.

FIG. 3 is a second side view of a power supply.

FIG. 4 is a top view of a power supply.

FIG. 5 is a third side view of a power supply.

FIG. 6 is a fourth side view of a power supply.

FIG. 7 is a top perspective view of a power supply.

FIG. 8 is a second top perspective view of a power supply; and,

FIG. 9 is a bottom perspective view of a power supply.

The broken lines and portions within form no part of the claimed design.

CLAIM The ornamental design for a power supply, as shown and described.